Georgia 2017 Corn Performance Tests Daniel J. Mailhot, Dustin Dunn, Henry Jordan, Jr., and J. LaDon Day, Editors The Georgia Agricultural Experiment Stations Department of Crop and Soil Sciences College of Agricultural and Environmental Sciences University of Georgia Griffin Campus Annual Publication 101-9 November 2017
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The Georgia Agricultural Experiment Stations Annual Publication 101-9Department of Crop and Soil Sciences November 2017College of Agricultural and Environmental SciencesUniversity of Georgia Griffin Campus
Georgia2017 Corn Performance Tests
Daniel J. Mailhot, Dustin Dunn,Henry Jordan, Jr., and J. LaDon Day,
Editors
The Georgia Agricultural Experiment Stations Annual Publication 101-9Department of Crop and Soil Sciences November 2017College of Agricultural and Environmental SciencesUniversity of Georgia Griffin Campus
Georgia2017 Corn Performance Tests
Daniel J. Mailhot, Dustin Dunn,Henry Jordan, Jr., and J. LaDon Day,
Editors
The Georgia Agricultural Experiment Stations Department of Crop and Soil SciencesCollege of Agricultural and Environmental Sciences University of Georgia Griffin Campus
Annual Publication 101-9November 2017
Conversion TableU.S.Abbr. Unit Approximate Metric Equivalent
Lengthmi mile 1.609 kilometersyd yard 0.9144 metersft or ' foot 30.48 centimetersin or " inch 2.54 centimeters
Areasq mi or mi2 square mile 2.59 square kilometersacre acre 0.405 hectares or 4047 square meterssq ft or ft2 square foot 0.093 square meters
Volume/Capacitygal gallon 3.785 litersqt quart 0.946 literspt pint 0.473 litersfl oz fluid ounce 29.573 milliliters or 28.416 cubic centimetersbu bushel 35.238 literscu ft or ft3 cubic foot 0.028 cubic meters
Mass/Weightton ton 0.907 metric tonlb pound 0.453 kilogramoz ounce 28.349 gramsMetricAbbr. Unit Approximate U.S. Equivalent
Lengthkm kilometer 0.62 milem meter 39.37 inches or 1.09 yardscm centimeter 0.39 inchmm millimeter 0.04 inch
Areaha hectare 2.47 acres
Volume/Capacityliter liter 61.02 cubic inches or 1.057 quartsml milliliter 0.06 cubic inch or 0.034 fluid ouncecc cubic centimeter 0.061 cubic inch or 0.035 fluid ounce
Mass/WeightMT metric ton 1.1 tonskg kilogram 2.205 poundsg gram 0.035 ouncemg milligram 3.5 x 10-5 ounce
Sam PardueDean and Director
Allen J. MooreAssociate Dean for Research
Lew K. HunnicuttAssistant Provost andGriffin Campus Director
Joe W. WestAssistant Dean
Southern Region
ISSN 0072-128X
PREFACE
This research report presents the results of the 2017 corn performance trials. Corn performance trials were conducted at six locations throughout Georgia (see map inside back cover) in 2017. Short-season and mid-season hybrids were planted at Tifton, Plains, and Midville in the Coastal Plain region, at Athens in the Piedmont region, at Calhoun in the Limestone Valley region, and at Blairsville in the Mountain region. Hybrids used for silage were evaluated at Tifton, Athens, Calhoun, and Blairsville.
At each site, all plots within a maturity group were seeded at the rates specified and not thinned, and the populations at harvest are included in the tables. Information concerning fertilization and cultural practices used in each trial is included with the tables. Grain harvesting was done with a plot combine, and yields were adjusted to 15.5% moisture. Silage harvest was conducted using a small silage chopper and weighed by hand. Yields are expressed in English tons (2,000 pounds). Since data averaged over several years indicate a hybrid's yield potential better than data from only a single year, average yields over several years are included in this report.
The least significant difference (LSD) at the 10% level has been included in the tables to aid in comparing hybrids. If the yields' difference of any two hybrids exceeds the LSD value, they can be considered different in yield ability. Bolding is used in the performance tables to indicate hybrids with yields statistically equal to the highest yielding entry in the test. The standard error (Std. Err.) of an entry mean is included at the bottom of each table to provide a general indicator of the level of precision of each experiment. The lower the value of the standard error of the entry mean, the more precise the experiment.
Producers of hybrid seed corn are invited to enter their hybrids in the Georgia performance trials. Most hybrids entered are commercially available in Georgia, but a few experimental hybrids are also entered. Entry of a hybrid in these trials does not imply endorsement or recommendation by the University of Georgia College of Agricultural and Environmental Sciences.
This report is one of five publications presenting the performance of agronomic crops in Georgia. For information concerning the performance of other crops, refer to one of the following research reports: 2016-2017 Small Grain Performance Tests (Annual Publication 100-9); the 2016 Soybean, Sorghum Grain and Silage, and Summer Annual Forages Performance Tests (Annual Publication 103-8); the 2016Peanut, Cotton, and Tobacco Performance Tests (Annual Publication 104-8), and the 2013-2014 Canola Performance data (www.swvt.uga.edu/canola.html).
This report, along with performance test information on other crops, is also available online at www.swvt.uga.edu. Additional information may be obtained by writing to Dr. Daniel J. Mailhot, Crop and Soil Sciences Department, University of Georgia, Griffin Campus, 1109 Experiment Street, Griffin, GA 30223-1797.
Cooperators
Mr. A. Black, Southeast Research & Education Center, Midville, GeorgiaDr. D. Buntin, Entomology Department, UGA-Griffin, Griffin, Georgia
Mr. R. Covington, Mountain Research & Education Center, Blairsville, GeorgiaDr. Kedong Da, USDA-ARS, UGA-Tifton, Tifton, Georgia
Dr. I. Flitcroft, Crop & Soil Sciences Department, UGA-Griffin, Griffin, GeorgiaMr. J. Gassett, Iron Horse Plant Sciences Farm, Watkinsville, Georgia
Dr. B. Z. Guo, USDA-ARS, UGA-Tifton, Tifton, GeorgiaMr. S. R. Jones, Southwest Research & Education Center, Plains, Georgia
Dr. X. Ni, USDA-ARS Crop Genetics & Breeding Research Unit,UGA-Tifton, Tifton, Georgia
Mr. E. T. Ross, Field Research Services, UGA-Tifton, Tifton, GeorgiaDr. M. Toews, Entomology Department, UGA-Tifton, Tifton, Georgia
Mr. P. C. Worley, Northwest Research & Education Center, Calhoun, Georgia
Contributors
The following individuals contributed to the gathering of data and preparation of this report: R. Brooke, A. Burgess, J. Cartey, H. Deems, T. Dunn, M. Flynn, J. Gamblin, D. Gordon, J. Griffin, W. Hedden, W. Jones, L. Lee, R. Milton, L. Munoz, A. Overton, D. Patterson, D. Pearce, J. Penn, J, Roach, J. Roberts, D. Rogers, D. Stephens, K. Stratton, T. Strickland, J. Stubbs, P. Tapp, J. Wallace, G. Ware, and B. Weldy.
Acknowledgment
We wish to thank Monsanto for providing the buffer plot seed for the trials.
CONTENTSThe Season .................................................................................................................................................. 1
Growing Season Rainfall, 2017............................................................................................................... 1
Grain Tests ResultsCorn Hybrid Performance in the Coastal Plain Region
Silage Tests ResultsCorn Hybrid Performance for Use as Silage
Summary of Evaluations of Corn Hybrids for Silage:Blairsville, Athens, and Tifton, Georgia, 2017 .................................................................................. 26
Summary of Quality Factors of Corn Hybrids for Silage, Tifton, Georgia, 2017 ................................... 28Summary of Nutrient Removal Rates of Corn Hybrids for Silage, Tifton, Georgia, 2017 ..................... 30Tifton, Georgia: Evaluation of Corn Hybrids for Silage, 2017, Irrigated ................................................ 32Athens, Georgia: Evaluation of Corn Hybrids for Silage, 2017, Irrigated.............................................. 34Calhoun, Georgia: Evaluation of Corn Hybrids for Silage, 2017 Irrigated............................................. 35Blairsville, Georgia: Evaluation of Corn Hybrids for Silage, 2017, Nonirrigated ................................... 36
Daniel J. Mailhot is the program director of the statewide variety testing program, Henry Jordan Jr. is a research professional III, and J. LaDon Day is a research scientist in the Crop and Soil Sciences Department, UGA-Griffin,Griffin, Georgia 30223-1797. Dustin G. Dunn is a research professional III in the Crop and Soil Sciences Department, UGA-Tifton, Tifton, Georgia 31793-5766.
2017 Corn Performance Tests
Edited byDaniel J. Mailhot, Dustin G. Dunn,
Henry Jordan Jr., and J. LaDon Day
The Season
The 2017 planting season began in April with warmer-than-usual temperatures, similar to the previous 3 years. Rainfall contributed to planting delays in the northernportion of the state, while drier-than-average conditions had the same effect on non-irrigated fields in south Georgia. Warmer-than-average temperatures extended into May, but rainfall was adequate. June was cooler than average and remained moist. In July, warmer and drier weather returned, but August was near normal. Southern rust was present throughout most of the state and all of the variety tests by late July.
Seasonal rainfall totals are shown in the table below.
Growing Season Rainfall1, 2017Month Athens2 Blairsville Calhoun3 Midville Plains Tifton
1. Data submitted by Dr. I. Flitcroft, UGA-Griffin, Griffin, Ga.2. Iron Horse Plant Science Farm.3. Floyd County location.
Total corn plantings in Georgia were down by 10% compared to 2016 but similar to the previous 4 years. Grain-harvested acres were similar to last year, and official numbers for silage acres and yield are not available. The statewide grain yield of 184 bushels/acre exceeded the previous record of 180 bushels/acre, set in 2012. The table on the following page provides2013-to-2017 comparisons of planted and harvested acres. Favorable growing conditions especially benefitted non-irrigated acreage.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 11.4%, and df for EMS = 51.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 16, 2017.28,500 seeds per acre in 30-inch rows.
P = Low, K = Medium, and pH = 6.0.28 lb N, 55 lb P2O5, and 82 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);130 lb N/acre as sidedress.Fallow.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 8.7%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 16, 2017.
P = Low, K = Medium, and pH = 6.0.28 lb N, 55 lb P2O5, and 82 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);130 lb N/acre as sidedress.Fallow.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 8.7%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 16, 2017.
P = Low, K = Medium, and pH = 6.0.28 lb N, 55 lb P2O5, and 82 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);130 lb N/acre as sidedress.Fallow.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
37,000 seeds per acre in 30-inch rows.Tifton loamy sand.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 4.4%, and df for EMS = 51.
Std. Err. of Entry Mean
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 17, 2017.
P = Medium, K = Medium, and pH = 6.2.125 lb N, 185 lb P2O5, and 310 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);260 lb N/acre as sidedress.Peanuts.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control; irrigated 17.5 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 4.0%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 17, 2017.
P = Medium, K = Medium, and pH = 6.2.125 lb N, 185 lb P2O5, and 310 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);260 lb N/acre as sidedress.Peanuts.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control; irrigated 17.5 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 4.0%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 17, 2017.
P = Medium, K = Medium, and pH = 6.2.125 lb N, 185 lb P2O5, and 310 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset);260 lb N/acre as sidedress.Peanuts.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weed control;Telone II used for nematode control; irrigated 17.5 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.6%, and df for EMS = 45.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 28, 2017.August 17, 2017.37,000 seeds per acre in 30-inch rows.
P = Medium, K = Medium, and pH = 6.2.125 lb N, 185 lb P2O5, and 310 lb K2O/acre as preplant; 10 lb N and 34 lb P2O5/acre at planting;260 lb N/acre as sidedress.Peanuts.Disked, subsoiled/bedded, and rototilled; Atrazine, Aidua, and Warrant used for weed control;Telone II used for nematode control; irrigated 17.5 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
37,000 seeds per acre in 30-inch rows.Greenville sandy clay loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.1%, and df for EMS = 51.
Std. Err. of Entry Mean
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 30, 2017.August 23, 2017.
P = Medium, K = Very High, and pH = 6.0.147 lb N, 120 lb P2O5, and 0 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset); 200 lb N/acre as sidedress; 1000 lb dolomitic lime/acre.Soybeans.Disked, subsoiled, field conditioned, rototilled, and one cultivation; Atrazine and Warrant used forweed control; irrigated 6.05 inches.
Test conducted by D. Dunn, D. Pearce, W. Jones, R. Brooke, and M. Cofield.
37,000 seeds per acre in 30-inch rows.Greenville sandy clay loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.1%, and df for EMS = 51.
Std. Err. of Entry Mean
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 30, 2017.August 23, 2017.
P = Medium, K = Very High, and pH = 6.0.147 lb N, 120 lb P2O5, and 0 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset); 200 lb N/acre as sidedress; 1000 lb dolomitic lime/acre.Soybeans.Disked, subsoiled, field conditioned, rototilled, and one cultivation; Atrazine and Warrant used forweed control; irrigated 6.05 inches.
Test conducted by D. Dunn, D. Pearce, W. Jones, R. Brooke, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.6%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 30, 2017.August 23, 2017.
P = Medium, K = Very High, and pH = 6.0.147 lb N, 120 lb P2O5, and 0 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset); 200 lb N/acre as sidedress; 1000 lb dolomitic lime/acre.Soybeans.Disked, subsoiled, field conditioned, rototilled, and one cultivation; Atrazine and Warrant used forweed control; irrigated 6.05 inches.
Test conducted by D. Dunn, D. Pearce, W. Jones, R. Brooke, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.6%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 30, 2017.August 23, 2017.
P = Medium, K = Very High, and pH = 6.0.147 lb N, 120 lb P2O5, and 0 lb K2O/acre as preplant; 10 gal 10-34-0-10/acre (2x2 inch offset); 200 lb N/acre as sidedress; 1000 lb dolomitic lime/acre.Soybeans.Disked, subsoiled, field conditioned, rototilled, and one cultivation; Atrazine and Warrant used forweed control; irrigated 6.05 inches.
Test conducted by D. Dunn, D. Pearce, W. Jones, R. Brooke, and M. Cofield.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.7%, and df for EMS = 50.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 11, 2017.August 29, 2017.35,900 seeds per acre in 30-inch rows.
P = Medium, K = High, and pH = 6.4.60 lb N, 150 lb P2O5, and 250 lb K2O/acre as preplant; 39 lb N, 43 lb P2O5, 0 lb K2O/acre (banded) at planting; 228 lb N/acre as sidedress.Soybeans.Disked, field conditioned, and subsoiled/bedded; Atrazine and Warrant used for weed control;Telone II used for nematode control; irrigated 10.25 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
(Continued)1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 7.8%, and df for EMS = 75.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 11, 2017.August 29, 2017.35,000 seeds per acre in 30-inch rows.
P = Medium, K = High, and pH = 6.4.60 lb N, 150 lb P2O5, and 250 lb K2O/acre as preplant; 39 lb N, 43 lb P2O5, 0 lb K2O/acre (banded) at planting; 228 lb N/acre as sidedress.Soybeans.Disked, field conditioned, and subsoiled/bedded; Atrazine and Warrant used for weed control;Telone II used for nematode control; irrigated 10.25 inches.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
Test conducted by H. Jordan, G. Ware, J. Cartey, J. Griffin, and K. Roach.
Masada A/Wickham sandy loam.
1. Yields calculated at 15.5% moisture.
4. Grain quality rating: 1 = excellent to 5 = poor.5. Grain moisture at harvest.6. CV = 7.2%, and df for EMS = 30.7. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 13, 2017.September 7, 2017.30,000 seeds per acre in 30-inch rows.
2. 2-year data comprised of Athens 2017 and Griffin 2016 trials.3. 3-year data comprised of Athens 2017, Griffin 2016, and Griffin 2015 trials.
Piedmont Region
P = Medium, K = High, and pH = 6.1.38.5 lb N, 182 lb P2O5, and 210 lb K2O/acre as preplant; 278 lb N/acre as sidedress; 1,500 lbdolomitic lime/acreCotton.Disked and rototilled; Atrazine and Zidua used for weed control; irrigated 3 inches.
Test conducted by H. Jordan, G. Ware, J. Cartey, J. Griffin, and K. Roach.
Masada A/Wickham sandy loam.
1. Yields calculated at 15.5% moisture.
4. Grain quality rating: 1 = excellent to 5 = poor.5. Grain moisture at harvest.6. CV = 7.2%, and df for EMS = 30.7. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 13, 2017.September 7, 2017.30,000 seeds per acre in 30-inch rows.
2. 2-year data comprised of Athens 2017 and Griffin 2016 trials.3. 3-year data comprised of Athens 2017, Griffin 2016, and Griffin 2015 trials.
Piedmont Region
P = Medium, K = High, and pH = 6.1.38.5 lb N, 182 lb P2O5, and 210 lb K2O/acre as preplant; 278 lb N/acre as sidedress; 1,500 lbdolomitic lime/acreCotton.Disked and rototilled; Atrazine and Zidua used for weed control; irrigated 3 inches.
P = Medium, K = High, and pH = 6.1.38.5 lb N, 182 lb P2O5, and 210 lb K2O/acre as preplant; 278 lb N/acre as sidedress; 1,500 lbdolomitic lime/acreCotton.Disked and rototilled; Atrazine and Zidua used for weed control; irrigated 3 inches.
Test conducted by H. Jordan, G. Ware, J. Cartey, J. Griffin, and K. Roach.
Masada A/Wickham sandy loam.
1. Yields calculated at 15.5% moisture.2. 2-year data comprised of Athens 2017 and Griffin 2016 trials.3. 3-year data comprised of Athens 2017, Griffin 2016, and Griffin 2015 trials.4. Grain quality rating: 1 = excellent to 5 = poor.5. Grain moisture at harvest.6. CV = 10.9%, and df for EMS = 51.7. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 13, 2017.September 7, 2017.26,500 seeds per acre in 30-inch rows.
September 9, 2017.31,500 seeds per acre in 30-inch rows.Rome gravelly clay loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 10.4%, and df for EMS = 21.
Std. Err. of Entry Mean
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.
P = High, K = Very High, and pH = 6.5.60 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 135 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
September 9, 2017.31,500 seeds per acre in 30-inch rows.Rome gravelly clay loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 10.4%, and df for EMS = 21.
Std. Err. of Entry Mean
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.
P = High, K = Very High, and pH = 6.5.60 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 135 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
60 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 135 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
Std. Err. of Entry Mean
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.September 9, 2017.31,500 seeds per acre in 30-inch rows.Rome gravelly clay loam.P = High, K = Very High, and pH = 6.5.
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 10.3%, and df for EMS = 22.
120 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 268 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control;irrigated 5 inches.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
Std. Err. of Entry Mean
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.September 9, 2017.35,000 seeds per acre in 30-inch rows.Waynesboro loam.P = High, K = Very High, and pH = 6.4.
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 12.3%, and df for EMS = 24.
120 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 268 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control;irrigated 5 inches.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
Std. Err. of Entry Mean
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.September 9, 2017.35,000 seeds per acre in 30-inch rows.Waynesboro loam.P = High, K = Very High, and pH = 6.4.
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 12.3%, and df for EMS = 24.
120 lb N, 0 lb P2O5, and 0 lb K2O/acre as preplant; 268 lb N/acre as sidedress.Soybeans.Moldboard plowed, disked, and rototilled; Atrazine, Callisto, and Zidua used for weed control;irrigated 5 inches.
Test conducted by H. Jordan, G. Ware, and J. Stubbs.
Std. Err. of Entry Mean
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
May 3, 2017.September 9, 2017.35,000 seeds per acre in 30-inch rows.Waynesboro loam.P = High, K = Very High, and pH = 6.4.
NOTE: This trial has non-significant differences in yield primarily due to stand problems. The data is being presentedbut the editors recommend extreme caution in utilizing it. Although not in the Limestone Valley region, results from the Blairsville and Athens grain trials may provide more useful information this year.1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 14.2%, and df for EMS = 24.
35,000 seeds per acre in 30-inch rows.Suches loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 7.0%, and df for EMS = 27.
Std. Err. of Entry Mean
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 29, 2017.October 3, 2017.
P = High, K = Very High, and pH = 6.0.154 lb N, 183 lb P2O5, and 10 lb K2O/acre as preplant; 227 lb N/acre as sidedress.Soybeans.Moldboard plowed and disked; Accent Q and Callisto used for weed control.
35,000 seeds per acre in 30-inch rows.Suches loam.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 7.0%, and df for EMS = 27.
Std. Err. of Entry Mean
5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 29, 2017.October 3, 2017.
P = High, K = Very High, and pH = 6.0.154 lb N, 183 lb P2O5, and 10 lb K2O/acre as preplant; 227 lb N/acre as sidedress.Soybeans.Moldboard plowed and disked; Accent Q and Callisto used for weed control.
1. Yields calculated at 15.5% moisture.2. Grain quality rating: 1 = excellent to 5 = poor.3. Grain moisture at harvest.4. CV = 5.1%, and df for EMS = 39.5. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.
Soybeans.Moldboard plowed and disked; Accent Q and Callisto used for weed control.
Test conducted by H. Jordan and G. Ware.
April 29, 2017.October 3, 2017.35,000 seeds per acre in 30-inch rows.Suches loam.P = High, K = Very High, and pH = 6.0.154 lb N, 183 lb P2O5, and 10 lb K2O/acre as preplant; 227 lb N/acre as sidedress.
1. Data from the replicated silage trial at Tifton.2. Calculated using University of Wisconsin Corn Silage Evaluation System - Milk 2006 and reported as lbs milk/ton of dry matter (DM) and lbs milk/acre. Reported values are lower than previous years due to differences between the 2000 and 2006 model predictions, but for hybrid comparisons the 2006 model should be more accurate.3. CV = 13.0%, and df for EMS = 153.4. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.
1. Quality factors taken from the replicated silage trial at Tifton. 2. Calculated using University of Wisconsin Corn Silage Evaluation System - Milk 2006 and reported as lbs milk/ton of dry matter (DM) and lbs milk/acre. Reported values are lower than previous years due to differences between the 2000 and 2006 model predictions, but for hybrid comparisons, the 2006 model should be more accurate.
Summary of Quality Factors of Corn Hybrids for SilageTifton, Georgia, 2017 (Continued)
Quality Factors1
Milk Production2 Dry Matter Yield
Bolding indicates entries performing equally to highest performing entry within a column based on Fisher's protected LSD (P = 0.10).12. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.
6. Starch expressed as a percentage of dry matter.
3. Crude protein expressed as a percentage of dry matter. 4. Neutral detergent fiber: a measure of total fiber components expressed as a percentage of dry matter. 5. Acid detergent fiber: a measure of cellulose and lignin portions of total fiber as a percentage of dry matter.
8. Digestibility of neutral detergent fiber component after 48-hours expressed as a percentage of NDF. 9. Inorganic mineral elements present expressed as a percentage of dry matter.
11. CV = 3.9%, and df for EMS = 43.10. CV = 4.0%, and df for EMS = 43.
7. Total digestible nutrient: a measure of energy value expressed as a percentage of dry matter.
125 lb N, 185 lb P2O5, and 310 lb K2O/acre as preplant; 10 lb N and 34 lb P2O5/acre at planting; 260 lb N/acre as sidedress.Peanuts.Disked, subsoiled/bedded, and rototilled; Atrazine, Zidua, and Warrant used for weedcontrol; Telone II used for nematode control; irrigated 17.5 inches.
Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
March 29, 2017.July 21, 2017.
Test conducted by R. Brooke, D. Dunn, and M. Cofield.
Tifton, Georgia:Evaluation of Corn Hybrids for Silage, 2017, Irrigated
(Continued)
Company orBrand Name
HybridName
Forage Yield DryMatter
GrainPortion
PlantPopulation
2-Yr AvgDry Forage
Yieldtons/acre
Std. Err. of Entry Mean
1. CV = 8.6%, and df for EMS = 129.2. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.
35,500 seeds per acre in 30-inch rows.Tifton loamy sand.P = Medium, K = Medium, and pH = 6.2.
Test conducted by H. Jordan, G. Ware, J. Cartey, J. Griffin, and K. Roach.
34,000 seeds per acre in 30-inch rows.Masada A/Wickham sandy loam.P = Medium, K = High, and pH = 6,1.38.5 lb N, 182 lb P2O5, and 210 lb K2O/acre as preplant; 278 N/acre as sidedress; 1,500 lbdolomitic lime/acre.Cotton.Disked and rototilled; Atrazine and Zidua used for weed control; irrigated 3.0 inches.
August 1, 2017.
tons/acre
Athens, Georgia:Evaluation of Corn Hybrids for Silage, 2017, Irrigated
Company orBrand Name
HybridName
Forage Yield DryMatter
GrainPortion
PlantPopulation
2-Yr AvgDry Forage
Yield1
1. 2-year data comprised of Athens 2017 and Griffin 2016 trials.2. CV = 10.1%, and df for EMS = 48.3. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
A corn silage trial was planted at this location on May 3, 2017. However, stand problems at harvest increased variability in and among plots. After careful analysis and review of the data, it is the opinion of the editors that the results of this trial may not accurately reflect the genetic performance potential of all the test entries. Since this data is not useful for making decisions and could be misleading if used in making variety selections, it will not be presented in the publication.
tons/acre
Calhoun, Georgia:Evaluation of Corn Hybrids for Silage, 2017, Irrigated
Blairsville, Georgia:Evaluation of Corn Hybrids for Silage, 2017, Nonirrigated
Company orBrand Name
HybridName
Forage Yield DryMatter
GrainPortion
PlantPopulation
2-Yr AvgDry Forage
Yield
Test conducted by H. Jordan and G. Ware.
Std. Err. of Entry Mean
34,900 seeds per acre in 30-inch rows.Suches loam.P = High, K = Very High, and pH = 6.0.154 lb N, 183 lb P2O5, and 10 lb K2O/acre as preplant; 227 lb N/acre as sidedress.Soybeans.Moldboard plowed and disked; Accent Q and Callisto used for weed control.
1. CV = 15.6%, and df for EMS = 48.2. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
Blairsville, Georgia:Evaluation of Corn Hybrids for Silage, 2017, Nonirrigated
Company orBrand Name
HybridName
Forage Yield DryMatter
GrainPortion
PlantPopulation
2-Yr AvgDry Forage
Yield
Test conducted by H. Jordan and G. Ware.
Std. Err. of Entry Mean
34,900 seeds per acre in 30-inch rows.Suches loam.P = High, K = Very High, and pH = 6.0.154 lb N, 183 lb P2O5, and 10 lb K2O/acre as preplant; 227 lb N/acre as sidedress.Soybeans.Moldboard plowed and disked; Accent Q and Callisto used for weed control.
1. CV = 15.6%, and df for EMS = 48.2. The F-test indicated no statistical differences at the alpha = 0.10 probability level; therefore an LSD value was not calculated.Bolding indicates entries yielding equal to highest yielding entry within a column based on Fisher's protected LSD (P = 0.10).
April 29, 2017.September 7, 2017.
Insect Screening Results
Multiple Insect Resistance in 59 Commercial Corn Hybrids, 2017
Xinzhi Ni, Michael D. Toews, and G. David Buntin
Commercial corn hybrids were screened for ear- and kernel-feeding insect resistance under field conditions at Tifton, Georgia. Nine hybrids were rated Very Good (VG), the highest rating for multiple insect resistance in 2017 (see following table). Thirteen hybrids were Good (G), 19 were Fair (F), and 13 were Poor (P). One hybrid included a blend of 80% transgenic and 20% non-transgenic seeds, known as refuge in a bag (RIB). In cotton growing area and all of Georgia, RIB products are required to have a 20% Non-Bt structured refuge. Three hybrids were developed utilizing YHR traits (also known as Optimum® Intrasect™), 13 hybrids have Genuity VT Double PRO (VT2P) traits, and 1 hybrid has VT Triple PRO (VT3P) traits. The Optimum® Intrasect™ insect protection traits (or YHR) include a combination of two insect protection traits –Herculex® I and YieldGard® Corn Borer, while the VT2P or VT3P traits contain a stack of two or three Bt genes. VT2P hybrids targeted foliar- and ear-feeding lepidopteran pests, while VT3P hybrids have an additional Bt gene for rootworms.
Overall insect damage on corn ears was relatively high in the 2017 trial, which is comparable to what was observed in 2016. The six types of ear- and/or kernel-feeding insects in the order of damage severity were corn earworm and fall armyworm, stink bugs, sap beetles, pink scavenger caterpillar, and maize weevil. Corn earworm and fall armyworm damage was combined because the damage on corn cob is difficult to separate. Feeding penetration by these caterpillar pests of natural infestations in corn ears was between 0.2 and 2.8 cm, which was lower than the damage observed in 2016(0.2-3.5 cm). Multiple species of sap beetles were recorded in 2017. Stink bug damage in 2017 was relatively low, ranging from 0.1 to 1.6% of the kernels per ear, which was less than that in 2016, 0.1 to 1.4%. Sap beetle damaged kernels were 0.7-4.1%, which is greater than 0.2-2.4% in 2016, as well as pink scavenger caterpillar damaged kernels were <1% in 2017 and 2016. In addition, flowering time of all entries were similar (between 51 and 57 days after planting), irrespective of categorization of Short (S) or Medium (M) maturity as shown in the table. Relatively early flowering (50-57 days after planting) was observed in 2017, which is similar to what we observed in 2016.
Because husk tightness and husk extension are considered important traits for ear-and kernel-feeding insect resistance, the husk features of the sampled ears were examined. Husk tightness was assigned using a scale of 1 to 5, in which 1 = very loose and 5 = very tight. Average ratings for husk tightness were between 3.4 and 4, which were all considered medium for husk tightness. Husk extension ranged between 0.1 and 5.3 cm, and was negatively correlated to worm penetration and percentage of sap-beetle-damaged kernels in corn ears, but not to husk tightness. Multiple insect resistance was categorized in four groups according to the insect damage ratings on corn cobs and kernels: they are very good (VG), good (G), fair (F), and poor (P). VG represents the least amount of insect damage, while P represents the greatest amount of insect damage. The rankings of the 59 hybrids for multiple insect resistance in the table was based on the results of the principal component analysis using corn husk extension and tightness along with damage caused by corn earworm and fall armyworm, stink bugs, sap beetles, pink scavenger caterpillar, and maize weevil. The lettered
ratings in the table refer only to relative resistance to insects, and are based on a principal component analysis with husk tightness and extension, corn earworm and fall armyworm damage, and stink bug, sap beetle, and pink scavenger caterpillar damage. The data in this report are not indicative of yield. For yield data of a hybrid, please refer to other reports provided in this publication.
Hybrids resistant to multiple insects are highly recommended for planting and are one of the most economical insect management strategies, especially in late plantings. Increased insect damage can lead to yield loss, as well as quality loss related to aflatoxin contamination. Consult with your local county agent and/or Extension entomologist for additional control recommendations for a specific pest in your area.
The trial was planted on the University of Georgia Gibbs Research Farm near Tifton, Georgia on April 11, 2017, and harvested on August 3, 2017. The experimental plots were thinned to 20,000 plants per acre and maintained following local Extension-publication-recommended agronomic practices by Penny Tapp (USDA-ARS, Tifton). The data were collected by Penny Tapp, Henry Deems, and Ashleigh Burgess (USDA-ARS, Tifton).
Terral Seed REV®26BHR50™ Brand 56 2.25 M 0.78 VG G+T.A. Seed TA765-30 56 3.25 M 0.33 VG G+AgraTech 908VIP 56 1.30 M 0.48 VG F+Pioneer P1870YHR 54 1.60 M 0.73 VGMorCorn MC4725 55 2.50 M 1.08 VG
Syngenta NK N78S-3111 54 2.95 M 1.28 VGSyngenta NK N83D-3111 56 0.90 T 0.55 VGT.A. Seed X20544 54 2.10 M 1.03 VGAgraTech 1778 56 3.80 M 0.55 VGPioneer P1916YHR 55 4.40 M 0.35 G VG-
Dyna-Gro D58VC37 53 2.80 M 0.68 G VG-Phoenix 6542 55 2.45 M 0.55 GDeKalb DKC 70-27 VT2P 54 1.45 M 0.95 G F+Augusta 7767VT2PRO 53 4.75 M 0.95 G GAugusta 7766VT2PRO 52 4.85 M 0.45 G G
Croplan 5678 VT2P 55 1.70 M 1.15 GTerral Seed REV®28BHR18™ Brand 55 1.65 M 1.38 GPioneer P1662YHR 53 1.20 M 1.15 GArmor 1717 54 1.95 M 1.28 GArmor AXT7116 54 4.60 M 1.35 G
Armor AXC7118 54 1.40 M 1.58 GT.A. Seed TA774-22DPRIB 53 5.75 M 0.85 GAgriGold A6659VT2PRO 53 1.45 M 1.58 GAgriGold A6711VT2PRO 54 4.45 M 0.53 GT.A. Seed X20543 54 1.60 T 0.95 G
T.A. Seed X20545 54 4.30 M 0.50 GT.A. Seed X20546 54 1.45 M 1.38 GAgraTech 85VT2P 56 1.30 M 1.18 GAgraTech 75VT2P 54 1.60 M 1.08 GT.A. Seed X20390 53 1.40 M 1.18 F
Dyna-Gro D58VC65 54 2.05 M 1.30 FPhoenix 7402 55 1.40 M 1.45 FT.A. Seed TA787-18 54 2.10 M 1.88 FDyna-Gro D57VP51 52 1.45 T 2.83 P PDeKalb DKC 67-44 VT2P 54 0.15 M 2.63 P F-
Ear-Feeding Insect Resistance in 59 Commercial Corn Hybrids,Tifton, Georgia, 2017
Terral Seed REV®25 BHR26™ Brand 56 2.65 M 1.05 VG F+Armor 1500 54 1.85 M 0.78 VGDyna-Gro D49VC39 53 2.15 M 0.20 VGDyna-Gro CX17212 54 2.20 T 0.58 VGAgraTech 65VT2P 54 1.90 M 0.53 VG
Augusta 1165VT2PRO 54 3.80 M 0.48 VGCroplan 6640 VT3P 54 2.00 M 1.45 G GT.A. Seed TA744-22DP 53 2.40 M 0.40 G G+Armor 1414 53 3.90 M 0.68 G GArmor AXC7114 54 1.53 T 1.47 G
Armor AXC7115 54 1.10 M 1.05 GDyna-Gro D50VC30 52 2.15 M 1.00 GMorCorn MC4319 54 1.75 M 1.00 GAugusta 6664VT2PRO 54 4.20 M 0.78 GAugusta 5065GTCBLL 56 3.05 M 0.95 G
Terral Seed REV®23BHR55™ Brand 55 2.05 M 2.18 F FDeKalb DKC 64-35 VT2P 54 0.80 M 1.45 F F-Dyna-Gro D52VC50 53 1.40 M 1.50 FAgriGold A6499STX 55 1.70 M 0.93 FAgriGold A6572STX 53 1.05 M 1.38 F
DeKalb DKC 65-94 STX 54 1.65 M 1.43 FSyngenta NK N76A-3010 53 1.40 M 2.53 P PDyna-Gro D55VC45 53 0.85 M 1.95 PAugusta 1564GT3000 55 1.50 M 1.88 P
5. Maturity denotes short or medium season maturity of a hybrid, which was provided by the seed company.
1. Days to anthesis is the number of days to flowering at Tifton, Georgia in 2017 after the hybrids were planted on April 11, 2017 (n = 4).2. Husk Tightness: L = loose husk, M = medium-tight husk, and T = tight husk.3. FAW+CEW damage denotes the ear penetration (cm) by corn earworm (CEW) and fall armyworm (FAW) feeding with natural infestation.4. Categorization of insect resistance to key ear- and kernel-feeding insects (i.e., corn earworm, fall armyworm, stink bugs, sap beetles, pink scavenger caterpillar, and maize weevil) was based on principal component analysis results. The data were collected from 20 ears per hybrid (5 ears x 4 replications), where VG = very good, G = good, F = fair, and P = poor. The + and - signs denote the fluctuation of damage ratings in recent (two or more) years.
Terral Seed REV®25 BHR26™ Brand 56 2.65 M 1.05 VG F+Armor 1500 54 1.85 M 0.78 VGDyna-Gro D49VC39 53 2.15 M 0.20 VGDyna-Gro CX17212 54 2.20 T 0.58 VGAgraTech 65VT2P 54 1.90 M 0.53 VG
Augusta 1165VT2PRO 54 3.80 M 0.48 VGCroplan 6640 VT3P 54 2.00 M 1.45 G GT.A. Seed TA744-22DP 53 2.40 M 0.40 G G+Armor 1414 53 3.90 M 0.68 G GArmor AXC7114 54 1.53 T 1.47 G
Armor AXC7115 54 1.10 M 1.05 GDyna-Gro D50VC30 52 2.15 M 1.00 GMorCorn MC4319 54 1.75 M 1.00 GAugusta 6664VT2PRO 54 4.20 M 0.78 GAugusta 5065GTCBLL 56 3.05 M 0.95 G
Terral Seed REV®23BHR55™ Brand 55 2.05 M 2.18 F FDeKalb DKC 64-35 VT2P 54 0.80 M 1.45 F F-Dyna-Gro D52VC50 53 1.40 M 1.50 FAgriGold A6499STX 55 1.70 M 0.93 FAgriGold A6572STX 53 1.05 M 1.38 F
DeKalb DKC 65-94 STX 54 1.65 M 1.43 FSyngenta NK N76A-3010 53 1.40 M 2.53 P PDyna-Gro D55VC45 53 0.85 M 1.95 PAugusta 1564GT3000 55 1.50 M 1.88 P
5. Maturity denotes short or medium season maturity of a hybrid, which was provided by the seed company.
1. Days to anthesis is the number of days to flowering at Tifton, Georgia in 2017 after the hybrids were planted on April 11, 2017 (n = 4).2. Husk Tightness: L = loose husk, M = medium-tight husk, and T = tight husk.3. FAW+CEW damage denotes the ear penetration (cm) by corn earworm (CEW) and fall armyworm (FAW) feeding with natural infestation.4. Categorization of insect resistance to key ear- and kernel-feeding insects (i.e., corn earworm, fall armyworm, stink bugs, sap beetles, pink scavenger caterpillar, and maize weevil) was based on principal component analysis results. The data were collected from 20 ears per hybrid (5 ears x 4 replications), where VG = very good, G = good, F = fair, and P = poor. The + and - signs denote the fluctuation of damage ratings in recent (two or more) years.
Georgia Mountain Research & Education Center, Blairsville
Northwest Research & Education Center, Calhoun
UGA Athens Campus
J. Phil Campbell Sr. Research & Education Center, Watkinsville
Central Research & Education Center, Eatonton
UGA Griffin Campus
Southeast Research & Education Center, Midville
Southwest Research & Education Center, Plains
Vidalia Onion & Vegetable Research Center, Reidsville
UGA Tifton Campus Blueberry Research & Demonstration Farm, Alma
C.M. Stripling Irrigation Research Park, Camilla
Attapulgus Research & Education Center, Attapulgus
CAES Campus Research Center
Annual Publication 101-9 November 2017Published by the University of Georgia in cooperation with Fort Valley State University, the U.S. Department of Agriculture, and counties of the state. For more information, contact your local UGA Cooperative Extension office.
The University of Georgia is committed to principles of equal opportunity and affirmative action.
extension.uga.edu
University of GeorgiaAgricultural Experiment StationsAthens, Georgia 30602Allen J. Moore, Associate Dean
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ADDRESS CORRECTION REQUESTED
Annual Publication 101-9 November 2017Published by the University of Georgia in cooperation with Fort Valley State University, the U.S. Department of Agriculture,and counties of the state.
For more information, contact your local UGA Cooperative Extension office.The University of Georgia is committed to principles of equal opportunity and affirmative action.